Multi-Tech Systems MVP 800 manual Software Loading and Configuration

Chapter 3 - Software Loading and Configuration

14.To change the voice coder, select the channel from the Select Channel list, then select the new voice coder entry from the Voice Coder list.

If you changed the voice coder, ensure that the same voice coder is used on the voice/fax channel you are calling. Otherwise, you will always get a busy signal.

15.If you selected the FXO interface and are using touchtone dialing, you can set up the DTMF gain (or output level in decibels - dB) for the higher and lower frequency groups of the DTMF tone pair. Make your selections from the lists in the DTMF Gain group. In the Duration box, enter the DTMF tone duration in milliseconds. 100 is entered by default

Note: Only change the DTMF gain under the direction of Multi-Tech Technical Support.

16.The Fax group enables you to send and receive faxes on the selected voice/fax channel. You can select the maximum baud rate for faxes from the list in the Fax group. If you do not plan to send or receive faxes on a given voice/fax channel, you can disable faxes in the Fax group.

Note: After configuring a given channel, you can copy that channel’s configuration to any other channel by clicking Copy. Everything on the Voice/Fax tab will be copied to the other channel.

17.You can enable the voice/fax advanced features by selecting the Silence Compression, Echo Cancellation, or Forward Error Correction check boxes.

The Silence Compression check box defines whether silence compression is enabled for this voice channel. If silence compression is enabled, the MultiVOIP 800 will not transmit voice packets when silence is detected, thereby reducing the amount of network bandwidth that is being used by the voice channel.

The Echo Cancellation check box defines whether echo cancellation is enabled for this voice channel. If echo cancellation is enabled, the MultiVOIP 800 will remove echo delay, which improves the quality of sound.

The Forward Error Correction (FEC) check box defines whether forward error correction is enabled for this voice channel. The FEC feature allows some of the voice packets that were corrupted or lost to be recovered. FEC adds an additional 50% overhead to the total network bandwidth consumed by the voice channel.

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